Bill Sprouse is a Senior Software Engineer for Honeywell Security/C & K Systems, Inc. in Folsom, California, where he is programming real-time signal-processing applications for motion detectors. He wrote the firmware for the company's 6805 and 8051 based designs. Bill has also applied for patents for anti-mask sensing and improved signal analysis algorithms, and he has been designing microcontroller hardware since 1984. For more information about Bill Sprouse or to contact him directly, click here.

Making a Cooperative DES Algorithm A Case Study - Part 1 So far this series of articles has presented a method of writing a cooperative multitasking system without the use of an embedded RTOS. In this article we will look at converting a real world algorithm to work within the constraints of this type of a system. The example I choose is a DES encryption algorithm.   Click here to read the complete article. Making a Cooperative DES Algorithm A Case Study - Part II In the previous article I showed how to convert a DES key creation algorithm to a cooperative multitasking system. This article will finish by showing how to convert the encryption/decryption algorithm.   Click here to read the complete article.

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